I'm am looking to purchase a 10 gauge SxS shotgun for my father. Specifically, I need a suitable gun for duck/goose hunting. It needs to have interchangable chokes. Price range is 600-1200. Either a new or used gun is acceptable (I'm unsure if anyone is making a new 10).

I have looked on Gunsamerica, auctionarms and gunbroker, but I really dont know enough about the side by sides to make an informed decision. Can anyone recommend some guns that I should be looking for? Thanks in advance.